diff --git a/gnu/packages/version-control.scm b/gnu/packages/version-control.scm
index fe61bc8fce..3e77548127 100644
--- a/gnu/packages/version-control.scm
+++ b/gnu/packages/version-control.scm
@@ -1799,26 +1799,46 @@ projects, from individuals to large-scale enterprise operations.")
 (define-public rcs
   (package
     (name "rcs")
-    (version "5.9.4")
+    (version "5.10.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnu/rcs/rcs-"
                                  version ".tar.xz"))
              (sha256
               (base32
-               "1zsx7bb0rgvvvisiy4zlixf56ay8wbd9qqqcp1a1g0m1gl6mlg86"))
-             (patches (search-patches "rcs-5.9.4-noreturn.patch"))))
+               "1if5pa4iip2p70gljm54nggfdnsfjxa4cqz8fpj07lvsijary39s"))
+             ;(patches (search-patches "rcs-5.9.4-noreturn.patch"))
+             ))
     (build-system gnu-build-system)
     (native-inputs `(("ed" ,ed)))
+    (inputs `(("time" ,(@ (gnu packages time) time))))
     (arguments
      `(#:phases (modify-phases %standard-phases
-                  (add-before 'check 'disable-t810
-                    ;; See https://savannah.gnu.org/bugs/index.php?52288
-                    ;; Back-porting the fix is non-trivial, so disable for now.
+                  (add-before 'check 'test-t632-debugging
                     (lambda _
-                      (substitute* "tests/Makefile"
-                        ((" t810 \\\\\n") ""))
-                     #t)))))
+                      (substitute* "tests/t632"
+                        (("timeout --foreground 0\\.42s")
+                         ;"timeout --foreground 50s") ;a
+                         ;"timeout 50s") ;b
+                         ;"LANG=C timeout --foreground 50s") ;c
+                         ;"LANG=C timeout") ;d
+                         "")
+                        ;(("timeout") (which "timeout"))
+                        )
+                      (invoke "grep" "timeout" "tests/t632")
+                     #t))
+                  (replace 'check
+                    (lambda _
+                      (with-directory-excursion "tests"
+                        (system* "time" "make" "check" "KEEPD=1" "VERBOSE=1" "TESTS=t632")
+                        (invoke "cat" "t632.d/signal-handling-out-and-err")
+                        (display (which "tty"))
+                        (newline)
+                        (system* (which "tty"))
+                        (system* "ls" "-la" (which "tty"))
+                        #f
+                        )))
+                  )))
     (home-page "https://www.gnu.org/software/rcs/")
     (synopsis "Per-file local revision control system")
     (description